<!doctype html>
<html>
<head>
  <title>Graph 3D tooltips</title>

  <style>
    body {font: 10pt arial;}
    div#info {
      width     : 600px;
      text-align: center;
      margin-top: 2em;
      font-size : 1.2em;
    }
  </style>

  <script type="text/javascript" src="../../dist/vis.js"></script>

  <script type="text/javascript">
    var data = null;
    var graph = null;

    function custom(x, y) {
      return (-Math.sin(x/Math.PI) * Math.cos(y/Math.PI) * 10 + 10);
    }

    // Called when the Visualization API is loaded.
    function drawVisualization() {
      var style = document.getElementById('style').value;
      var withValue = ['bar-color', 'bar-size', 'dot-size', 'dot-color'].indexOf(style) != -1;

      // Create and populate a data table.
      data = new vis.DataSet();
      var extra_content = [
        'Arbitrary information',
        'You can access data from the point source object',
        'Tooltip example content',
      ];

      // create some nice looking data with sin/cos
      var steps = 5;  // number of datapoints will be steps*steps
      var axisMax = 10;
      var axisStep = axisMax / steps;
      for (var x = 0; x <= axisMax; x+=axisStep) {
        for (var y = 0; y <= axisMax; y+=axisStep) {
          var z = custom(x,y);
          if (withValue) {
            var value = (y - x);
            data.add({x:x, y:y, z: z, style:value, extra: extra_content[(x*y) % extra_content.length]});
          }
          else {
            data.add({x:x, y:y, z: z, extra: extra_content[(x*y) % extra_content.length]});
          }
        }
      }

      // specify options
      var options = {
        width:  '600px',
        height: '600px',
        style: style,
        showPerspective: true,
        showLegend: true,
        showGrid: true,
        showShadow: false,

        // Option tooltip can be true, false, or a function returning a string with HTML contents
        tooltip: function (point) {
          // parameter point contains properties x, y, z, and data
          // data is the original object passed to the point constructor
          return 'value: <b>' + point.z + '</b><br>' + point.data.extra;
        },
  
        // Tooltip default styling can be overridden
        tooltipStyle: {
          content: {
            background    : 'rgba(255, 255, 255, 0.7)',
            padding       : '10px',
            borderRadius  : '10px'
          },
          line: {
            borderLeft    : '1px dotted rgba(0, 0, 0, 0.5)'
          },
          dot: {
            border        : '5px solid rgba(0, 0, 0, 0.5)'
          }
        },

        keepAspectRatio: true,
        verticalRatio: 0.5
      };

      var camera = graph ? graph.getCameraPosition() : null;

      // create our graph
      var container = document.getElementById('mygraph');
      graph = new vis.Graph3d(container, data, options);

      if (camera) graph.setCameraPosition(camera); // restore camera position

      document.getElementById('style').onchange = drawVisualization;
    }
  </script>
  
</head>

<body onload="drawVisualization()">

<p>
  <label for="style"> Style:
    <select id="style">
      <option value="bar">bar</option>
      <option value="bar-color">bar-color</option>
      <option value="bar-size">bar-size</option>

      <option value="dot">dot</option>
      <option value="dot-line">dot-line</option>
      <option value="dot-color">dot-color</option>
      <option value="dot-size">dot-size</option>

      <option value="grid">grid</option>
      <option value="line">line</option>
      <option value="surface">surface</option>
    </select>
  </label>
</p>

<div id="mygraph"></div>

<div id="info">Hover the mouse cursor over the graph to see tooltips.</div>

</body>
</html>
